Cosmological Constraints on Large Extra Dimensions
arXiv:hep-ph/0101131 · doi:10.1016/S0370-2693(01)00501-9
Abstract
We calculate the production of massive Kaluza-Klein(KK) modes via nucleon-nucleon gravi-bremsstrahlung in the early universe. Overproduction of these states would result in early matter domination and therefore a low age for the universe so it is possible to place constraints on the number and size of large extra dimensions. The constraints are stronger than those from Sn1987a - for 2 large extra dimensions and T_QCD=170 MeV, we show the fundamental scale must be larger than 1,000 TeV.
8 pages, 2 figures, accepted in PLB
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